Plateaus explained

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  • PeachyCarol
    PeachyCarol Posts: 8,029 Member
    ceoverturf wrote: »
    EWJLang wrote: »
    jofjltncb6 wrote: »
    stelper wrote: »
    jofjltncb6 wrote: »
    stelper wrote: »
    Amanda4change wrote: »
    Troutsy wrote: »
    stelper wrote: »
    Troutsy wrote: »
    stelper wrote: »
    Troutsy wrote: »
    Leptin
    noun
    1.a hormone that is thought to suppress appetite and speed up metabolism.

    (http://dictionary.reference.com/browse/leptin ?s=t)

    Sounds like it isn't 100% if it actually "speeds up metabolism" or not.

    Dig a little deeper into the functionality of Leptin. It also regulates your energy expenditure (BMR).

    Do you have some peer reviewed studies to share? Where did you get your information?
    A google search of leptin just gives me a whole lot of blogs telling me to reset my leptin levels.

    Yes. Here is a article that explains Leptin in terms of weight loss: http://www.bodybuilding.com/fun/sclark60.htm

    And here is a peer-reviewed article: http://www.jci.org/articles/view/45888
    Our current understanding of leptin action on energy balance is largely based on animal research and, therefore, one may wonder how much we have really learned about leptin action in the human brain

    It sounds like they don't really know either. That's from your peer reviewed study.

    According to OP's "study" obese people have low levels of Leptin, yet according to this study (as well as others) Leptin levels are HIGH in obese people: http://www.ncbi.nlm.nih.gov/m/pubmed/17212793/

    Those were studies done 6 years prior to the one I posted. The study of Leptin is still relatively new. Also, if people here are coming for confrontation, you are not going to find it. I do deserve the ridicule for my mix up of hormones because it was a careless mistake, and I apologize. I came across Leptin because I've been researching the reasoning by why some people are able to reach very lower body fat percentages with virtually no plateaus. They do this with a caloric deficit with consistent re-feed days to boost metabolism back up due to lower Leptin levels, which reduce BMR.

    Except I'm not aware of studies confirming this belief of reduced BMR from a reasonable deficit (and not just a reduced BMR from the reduction of overall weight itself). Sure, many have found a re-feed day helpful in adherence to an otherwise overly large deficit, but not that it affects BMR in any meaningful way.

    I'm not saying the belief isn't out there...it certainly is...everywhere you look (and, of course, by those selling you the idea), but the science that I'm aware of (and my own personal experience of daily logging for three+ years) has not yet demonstrated the belief is valid.

    I sincerely appreciate your non-hostile response. The article I posted: http://www.jci.org/articles/view/45888
    and
    http://www.bodybuilding.com/fun/sclark60.htm

    talk about Leptin levels affecting your energy expenditure

    "Since its discovery, leptin has been found to have profound effects on behavior, metabolic rate, endocrine axes, and glucose fluxes. Leptin deficiency in mice and humans causes morbid obesity, diabetes, and various neuroendocrine anomalies, and replacement leads to decreased food intake, normalized glucose homeostasis, and increased energy expenditure."

    I was always fascinated on why people were getting such great results with re-feed days. This is just the science behind it.

    I don't think those referenced articles prove what you think they prove...at least not for humans. They're certainly far less certain in their conclusions than you are in your post about them.

    And I still maintain that perceived success from re-feed days is more likely explained by better adherence to an overall caloric deficit than it is from some effect on BMR. BMR is simply very difficult to affect...especially over a relatively short period of time.

    I agree, and will add that for someone who is normally and consistently eating at a caloric deficit, a moderate "refeed" might also fuel a more energized workout, leading to a new boost on the burn side of the equation.

    Although, the ctrl-alt-bellybutton "reset" is my new favorite thing and I fully intend to shamelessly use it on the 8000 "reset your metabolism" threads that we see every week.

    Naturally I'll expect a royalty fee...payable in gelato or cupcakes.

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